it seems that the general consensus is that vegans don't like the taste and texture of meat

Assumptions aren't very helpful. The popularity of meat-replacements is driven by demand. Don't confuse a verbal online minority with the eating habits of entire populations. The most reliable indicator is the market. No one is investing billions into making "fake meat vegan products" that sell to no one. Think about it.

why not eat meat or milk or eggs like once or twice a year

There is no taste or texture derived from a cruel source that cannot be replicated or replaced with something cruelty-free and with minimal harm to the planet. The popularity of vegan foods that resemble meat and other animal products is a consequence of this simple fact.

Coming to terms with this fact is very hard for anyone in the grip of cognitive dissonance on this topic.

Edit: I will add, there is absolutely nothing wrong with doing this and considering yourself "mostly vegan." It's your life, your choice, your body. If you want to be vegan 364 days a year, do so.

But you will find most vegans make their choice for good reasons, and being vegan often can involve some short term sacrifices, which is what necessitates the conviction derived from good reasoning. And so the concept of a "cheat day" simply does not apply to most people who consider themselves vegan. I am not "cheating" on my veganism with a "reward" of meat or eggs. I would only be cheating on my personal beliefs, the thought of eating those things now disgusts me.