From my perspective it is not black or white. I think contracts are an extremely valuable tool in a lot of cases. For example leasing a retail outlet for ten years, signing up for a home warrany, and many other thousands of examples.

At the same time I agree and also prefer that in other cases that are much less complex contracts can either be reduced to a minimum and/or left off. Regarding your business and what you offer I find your approach interesting and am personally fine with it. Larger, more established firms would not accept it though as they have certain governance rules that don't allow them typically to just pay money to a vendor without a concrete agreement on what the deliverables etc. are. But it seems you don't need and want those which is actually great. It's much easier and more fun to do business based on trust. I 100% agree.