I also find it crazy that this is an unfixable issue. I was on with chat support asking about this issue and found this thread while I was awaiting a reply. I just started my store on Shopify so I'm definitely going to cancel and request a refund. It is unquestionably sub-optimal to have a longer URL like the ones forced upon Shopify stores - if they won't prioritize my company's success, I'm not staying on the platform.