Of course, Europe has good infrastructures. But Thailand is much cheaper than Europe (almost an order of magnitude cheaper for food and lodging).
An other thing that makes Thailand appealing is that there are many expats or long term tourists slacking/working there, so you wouldn't feel out of place living there with no well-defined purpose. I don't think you could get the same kind of vibe in Europe.
As far as prostitution goes, Thailand is VERY different from Europe and the US.
