I like success in my gardening adventure. If things go wrong, it's very likely to take 12 months to *try again* to make them right. That is quite a FAIL and, at the mercy of Mother Nature and unforseen events, the failure of seed companies don't need to contribute to the risk.
Experience, diversity and good fortune means that I have some gardening success. I have multiple choices for seed purchases. Because of past success with those companies, I feel that my plans can include some experiments. Staying 100% with the tried and true is kinda boring. Sure, that makes up a big percentage of my garden but the other part can be fun.
Seeds? If I feel that the company doesn't have a good enough reputation and if I feel that the company has failed me, I'm very unlikely to have anything to do with them. Choices. That is part of fortune and fun.
Steve