outsider
First Post
Because the verb you use "convince" (and the rest of your post) shows that there was an adversarial relationship between your group and your DM, where you had to often debate whether or not PC actions were viable or allowed.
With some DMs, this has been true. Other DMs not so much. Even with a DM that usually says "yes" though, the process is still there. Some players are going to chafe under a system where they constantly have to ask permission from somebody to do things(even if he usually says yes). Others are going to chafe under a system where they constantly have to consult the rules to determine whether they can do things(even if the rules usually say yes).