There will always be people who say it's wood, you don't need to be so accurate. I don't need to be that accurate, but in the first try setting the sled, that's what I got. I can't complain.
I can't tell you how many picture frames I've seen which weren't cheap with pretty poor miters. A crosscut sled can do just about as perfect miters as possible. Nothing wrong with achieving the best results. All too often in business, it's just "good enough" mentality.
I don't do production, I am a photographer by trade, I build things with wood almost daily for fun.
I have a Festool track saw I use to break down sheet goods. I think it would be more than sufficient on a 7 ft door, which in and of itself wouldn't require even the accuracy of the Festool.
Everyone has different levels of expectations, mine happen to be high. I have to deliver photos of excellent quality to clients, do the best photoshop work, etc. I just take that to my own hobby work. No harm in that.