In my experience being short doesn't have any real drawbacks outside of dating. Sure, tall guys make more money statistically, like $800 a year. That's less than $10K a year between a 5'0" and 6'0" guy. The variance on that statistic has to be insanely high as well. Sure, 58% of fortune 500 CEOs are over 6' tall, but guess what, most people aren't CEOs of publicly traded companies. The downside of being short in your career is basically negligible. If you're failing at making money, it's not because you're short, it's because you're bad at making money. If you have talent people will recognize it, and if you have entrepreneurial spirit being short isn't going to stop you from starting a business.
In dating, being short has real and significant disadvantages, especially with the most attractive women. Sure, short guys can get average looking and overweight women, and sometimes even decent looking ones. But the most attractive girls have unlimited men to choose from so they have no reason to consider short guys, unless the short guy is overwhelmingly good in other areas (i.e. being very rich). Women casually filter out men based on their height (both IRL and online) so being short is a very clear disadvantage here. On the other hand, have you seen an opening for an office job that has a height requirement? That's considered illegal discrimination.
If you're short and have an SO who you are attracted to and is attracted to you, that's great. You already beat the odds, why bother with LL? If I was married to a woman I was satisfied with, I would never get LL. The money, and more importantly, time wasted could be better spent doing almost anything else. LL is a terrible experience and total waste of time if you're just doing it to make yourself feel better. There are tons of other ways to feel better about yourself that don't involve breaking your legs. However, if you're doing it so you can find someone you like then at least there's a real life benefit to getting it done.
People keep talking about the "benefits" of LL, but can't seem to be able to explain what exactly these benefits are. Are you being bullied as an adult? Will 2-3 inches of height really help with that? Respect? Maybe you'll get slightly better first impressions with strangers if you're 2-3 inches taller, but I don't see people respecting a 5'8" man more than a 5'5" one based on height. Sports? You'll definitely be worse at these after LL, not better. Do you have height dysphoria or neurosis to a certain degree? LL might help with that, but so could therapy. If therapy can't fix it, then it sounds like you have a mental illness and I think getting LL to fix a mental illness is okay, especially if the cost is not a big deal to you.
I just don't see the point in suffering through LL if you're not doing it to improve your position in the dating pool, to correct dwarfism, or to cure your mental illness.