This is true, to a degree, but the difference in maintenance is not that big of a deal IMO. If you just factor in oil changes I'd say its easier AND CHEAPER to change the oil in a v-drive than it is changing the oil TWICE in a twin Yamaha. Cost around $65 to change the oil in a Raptor 6.2L and that's using AutoZone website as a reference, so there's certainly cheaper places to get it. At the end of the year it takes about an hour or less to winterize a typical v-drive. Any of the newer boats running the Raptor engines are closed loop therefore no need to pull the engine plugs. You would however still pull 5 drain plugs from the heat exchanger, exhaust manifolds and the transmission. Thankfully you have relatively easy access to the engine (side locker panels in inboards are removable for engine service reasons) and the v-drive itself has an access from the cockpit under the rear bench in most boats. Good thing for me is I hate the cold so my boating season usually stops around early November and I don't come out of hibernation until Feb-April so it's not really likely I have the urge to be out on the water during winter. I'm the type that if I can't swim in it then it just feels like such a tease and I'm a big puss for when it's cold
. I don't know how people live where it normally snows!
Don't forget that both of these boat types would have ballast bags, tanks and ballast pumps that would need winterization and service. At the end of the day you're still going to spend an hour or so "winterizing" or doing the annual service to either style of boat so it's not really that big of a deal IMO and seems to get blown out of proportion unless you dig into the forums and see it's not so bad. If anything inboard engine parts are MUCH cheaper and readily available anywhere within miles of your house. Not really possible with Yamaha parts.
Yes jets can be safer in terms of running gear but it's not like a v-drive has the prop anywhere near the rider or where someone would typically be swimming. If you were in the water and either boat came by at speed and hit you, you're likely not going to make it anyways. V-drives have surf systems hanging underneath the swim platform and jets have jet pumps, fins and other metal bits under their swim platform. Jets have their own dangers associated with them just like any boat. I guess the argument could be made either way but I think we all can agree a v-drive is probably the safest form of recreational prop boat in terms of the prop being the evil dangerous bad guy in the room.
Just my .02