I do a lot of power boating. Luanching is easy, it's retrieval that's difficult. The Rav4 EV has plenty of power but depending on the ramp and boat, front wheel drive is a problem. The boat assisst can be risky. I would never do it with my outboard with a $300 prop and $10k motor it's just not worth the risk - if the tilt is just a little too low the prop is gone and maybe gearbox/engine damage. With my inboard I will do that if needed, but the prop is protected by a trailer cage under the boat so there's no way for it to get damaged.
With a shallow ramp retrieval is easier, but then you need to back way into the water to float the boat. With a steep ramp it's better for the process, but more difficult to get traction with the vehicle. Then the ramp surface vary so much from corrugated to moss covered smooth cement, etc. I would never tr to retrieve my 26' Hurricane (3500#?) without rear or 4wd and not using a pickup as no weight oin the rear wheels. I use my Yukon or a Jeep. My 19' Ski brendella (2300#?) I can launch / retrieve with a pickup truck. The Brendella would definitely be okay that with the RAV on a good boat ramp as it is pretty light. So it just depends on the boat, the ramps you normally use, length of trailer, etc.