It’s probably fine to reuse it for a few days

My dude, hardly anyone uses a new towel every day. Its much more than “probably” fine. Its perfectly fine.

Is affluence the cause of germophobia because their parents convinced them frivolous luxury was actually important for staying healthy?

Don’t get me wrong, enjoy your fresh towels! That’s nice. That’s a luxury. Luxuries are nice. But don’t fool yourself into believing that you’re any healthier for not using the same towels twice.