I am not in any way suggesting it should be illegal. I don't think I mentioned that once.

What I am insinuating that if you're that young dating someone much older, there is almost always a massive power imbalance between the two in the relationship, romantically, and so it's a very difficult thing to overcome.

If you're a 30/40/50+ year old person dating a 19 year old, there is usually something wrong with one party, the other, or both in that scenario. A 19 year old, romantically, is not mature enough or at the same place in their life as a 50 year old person. This will, at best, strain the relationship significantly as each partner will want something different out of life as the relationship progresses.

If they don't, then one of them is likely a deeply broken individual. And that's usually going to be the much older person that's got some issues happening.

The 19 year old truly doesn't know any better, or thinks they do, or is getting something in trade like security from the much older person and they're willing to give up other aspects of their life in trade for this.