

Yeah, people will probably get angry and say mean things to you but those are just words which can be ignored. Offence is taken, not given.
This is naïve. The no one likes being insulted and downvoted for expressing their views. Sure, it doesn’t bother some people as much as others, but it’s not a conscious choice to “just ignore it,” as though that will prevent any negative feelings. The reality is that people with unpopular views stay silent to avoid these consequences, and that’s an entirely rational choice. You would do better to spend your time chastising people who attack those with unpopular views than to try to convince those with unpopular views to willingly expose themselves to online abuse.
They’re definitely cheaper than using cartridge razors, but personally I found decent cartridge razors just get a closer shave than safety razors. And it wasn’t for failing to learn how to use a safety razor either. I used one for several years, got good at it, but later switched back to cartridge razors on a whim and found that they simply get reliably closer shave than a single blade does. I still use soap and a brush rather than canned shaving cream, because it is much better and more economical, but for me the closer shave that comes with a cartridge razor is worth the price.