While it might be true, I’ve seen too many cases of infidelity and or dead bedrooms with relationships that didn’t had the former.

Also speaking from my own experience while I’ve experienced finding women more attractive as I got to know them better it wasn’t the same type of an attraction, as it wasn’t sexual but rather more complex in terms of seeing long term future possibilities and wanting to share experiences with them in order to enrich my own life, but it never really affected how physically attractive I found them.

Maybe I’m different, maybe men are different in general but at least for me I won’t settle for someone that doesn’t want to jump me or that I wouldn’t want to jump them to me it seems unnatural.

Sexual attraction is multifaceted, but by far the strongest and most important/longest-living aspect regarding the strength of a relationship is the biological component which is for all intents and purposes instant and present from the very beginning. If that's absent, you're definitely stacking the deck against you in a major way. I am not saying an LTR can't work, but you'll be putting in substantially more energy, time and effort to make it happen.

It's the difference between playing a game in easy vs nightmare mode.

This is all based on empirical observations. I am 55 years old, I've had more than 100 sexual partners in my life and a lot of relationships, some of them lacking the initial biological/animalistic sexual attraction factor I described here. I've been married twice, now divorced and in a long-term relationship with my partner. I have two daughters in their 20s.