Depending on the quality of the program, I agree that RCIA could be inconvenient, and if you already know a lot about church teachings, you may not even learn as much as you would expect in 8 months. Totally possible.
However, it’s really important to understand how the Catholic Church is different from other churches. The Catholic Church is God’s path that he himself created to bring men to himself now and to heaven later. This is the ordinary means by which He wills to save men, provided of course their cooperation. Through the Church He gives, most importantly, Himself in the Eucharist, which helps the soul to live a holy life.
The Catholic Church is not just another option among other Christian denominations, that you would pick based on the best music, or community, or convenient Mass times, or better preaching, etc. All these things are nice but the real reason to be Catholic is that in the Church you encounter God. Christ can’t be separated from His Church, it’s his bride.
I read somewhere the following analogy:
Imagine a frozen lake with a bridge over it. If you use the bridge to get to the other side, your chances of making it safely are very good. If you walk on ice, you might still make it - you hope the ice is thick enough- but it’s much more risky. The ordinary intended way to cross the lake is over the bridge.
The Catholic Church is the bridge to Heaven. Some people might still fall off, but the bridge is God’s intended way to get there. All other churches are like walking on ice. You may still make it, but it’s riskier and not how God intends it.
Maybe walking over the ice is quicker than walking a mile or more just to get to the bridge. Maybe it’s more fun, and you could even ice skate over it. But most people concerned with their safety would take the time to get to the bridge, even if it’s inconvenient. What you get on the other side is worth it.