Not exactly. The technical principles of all communication is higher bandwidth = higher power required and from another layer of the ISO model higher volume = higher collisions; both resulting in higher attenuation. Higher attenuation requires shorter distances per load. Having more smaller towers allows for 'alternative' paths to handle the load dynamically using bubble up technology. Older cell technology 'wired' (typically fiber) the cell towers to what were called MTSO's which then piped to another level of traffic management. Things have dramatically changed with 5G mainly because of the network technology once encroaching on their territory is now being used to tie all the minitowers together. Pure network technology is still faster and more expedient because there's a layer that's skipped. But 5G has the bucks and untethered freedom (greater reach than WIFI) to sway the people back to cellular. And, more important than any other reason is smaller 5G antennas have less 'property' liability. They can be used anywhere whereas entire real estate companies once existed for the sole purpose of buying or leasing land for cell towers and the heavy capital required for those towers. Not to mention maintenance, insurance. So, you can see why 5G is very popular.
All that aside, there have been NO government safety regulation updates since the mid 90's. There's increasing evidence these higher bandwidths can be dangerous. Also, there's a movement to 'reassess' the safety of 5G. Oh, it'll pass because of the trillions of dollars behind the cellular industry; not to mention the addiction to cell phones already. But, everyone should note the 'safety' warnings on the packages now. They weren't put there by accident. As you can see, I've been involved in this business since early on and am familiar with its growth. Follow the antenna in the design history of cellular phones. It's kind of like putting filters on cigarettes.