We have been RVing for 31 years and have owned 7 motorhomes. We much prefer to pull a small toad with a big motorhome than tow a big trailer or 5th wheel with a smaller vehicle (truck). Also prefer a sedan/SUV for sightseeing, rather than having to ride around in a truck.
As has been previously mentioned, many folks do RV with a truck and trailer or 5th wheel. Seems to me that making a decision depends a lot on how often you will RV (part time or full timing) and how long you want to stay in one location. For folks only RVing part of the year or full timers spending a lot of time at one location, a truck and trailer/5th wheel makes sense. No need to have lots of money tied up in another powertrain (motorhome) unless you plan to use it - - full time and travel a lot - - that's what we did for many years!