Yes, definitely, 100%. However, that shouldn’t necessarily take away anything from Montana. His abilities were perfect to fit into that system. Many other successful QBs couldn’t do as well in that system.
Steve Young was another one. He bounced around the CFL and the NFL before he proved the original West Coast Offense was his niche.
The other thing with both of them was Eddie DeBartolo was able to manipulate the system by deferring salaries to keep the 49ers top players from being free agents. Montana and Young ALWAYS had a top supporting cast.
Because of the manipulation, the NFL initiated new rules about player compensation so no team can now retain their top players like the 49ers used to do.