I agree there is no rule that every young Christian woman needs to attend a four-year college. I also agree that most colleges are dominated by liberal/progressive philosophy, which is an evil influence. It isn't always God's guidance that every young person go to college, at least not a liberal arts four-year college. There are other paths in life.
However, young Christian women will need ways to support themselves financially, and some of them have exceptional talents in the Arts and Humanities that they should steward for the Lord. Post-high-school training provides this. And if a Christian husband dies, the Christian wife will benefit from having a good way to pay the bills and put food on the table for the children. Impoverishment is a bad thing, even in the absence of college debt, and so is failing to develop God-given talents. Especially if those talents might lead to blessed common-grace breakthroughs in, say, medicine, or in influential works of art, NGO work, architecture, or other areas of skill (just to give a few examples).
The blogger also seems to assume that it's God's will for every Christian woman to marry.
The blogger, third, seems to assume that young Christian women have no discernment. Maybe many do not, but that would be the failure of their churches. A church youth ministry that is all morality and music has failed its young people, male or female.
It's no wonder church young people allegedly "lose" their faith when they go off to college. Many of them never really had faith, so when presented with philosophical alternatives that don't make you feel guilty and let you live as you please, they go for it. Others have never be taught how or why Christianity is rational, so in their first year in college their puny little twig-faith gets blown around badly. But this is not true of every young Christian woman.
Also, certain majors involve less direct indoctrination than others, like Physical Therapy. Unless you're going to say that a Christian should never have a non-Christian teacher, ever, on any subject.
Paul's injunction to all Christians, including to young women, is to work hard with our hands so as to share with others (Ephesians 4:28). If college is the best way for a young Christian woman to get equipped to work, because getting married and having children are not sure things in God's plan, then go to college. But attend a good church while you're in college, and find a good, solid collegiate fellowship like Campus Outreach.
Regarding tattoos, my personal opinion is that they are unwise. The Bible warns against women "adorning" themselves with eye-catching accouterments (1 Peter 3:3-5). Too much jewelry is adorning enough; I'm even less in favor of an adornment you can't take off.
If a person gets a racy or profane tattoo then receives Christ at a later time, they're likely to feel ashamed of it, and need to suffer a lot of pain having it removed. Why not stick with modest adornments that you can take off and put in your jewelry box at night? Plus, no one ever got a disfiguring, painful skin infection from a necklace.
So, personally speaking, I don't like tattoos. However, any implication that not having a tattoo means you are an innately more godly girl is obviously untrue, and silly, and a teaching like that shows a really poor grasp of Biblical holiness.