Soundbars really don't have these features. They have speakers which are a bit better than what's built into the TV and they often use proprietary surround sound speakers which are, once again, barely better than what comes with the TV. But, they rarely actually offer any room correction, or features which every room really does need to get accurate audio in the space. You get no distance setup, or any tuning of the system at all, along with zero expandability.
If you want the system simple, then set it up that way. Receivers all tend to have ARC, or more often eARC built into them these days. They support multiple HDMI inputs and all sorts of other features, which you can choose to use, or not to use, as you would like.
This has been discussed recently, but there is ZERO incentive for a company like Denon to make a receiver that is dumbed down from all the technology they have developed over the decades. It doesn't offer THEM any savings, so it wouldn't offer YOU any savings. The vast majority of people in your situation just get a speaker bar and call it a day. They don't own decent speakers. They don't own jack. So, they buy a jenky setup of a speaker bar and think they have something special.
If you have good speakers, then you should run wires to them to maintain the best audio. Both Yamaha and Denon do sell some wireless solutions that are available, but unlike the speaker bar manufacturers who force you to use their weak wireless surround speakers. Denon and Yamaha allow you to use whatever you have. You will likely need their musiccast or whatever system amp to get this to work.
Just because you don't use something, don't think for a second it would cost less to purchase it. This is just not how economies of scale work. Yamaha and Denon make receivers that as many people as possible will purchase, then they sell them for pretty ridiculously low prices considering all the features that are included. They include the latest and greatest audio processing and video scaling along with quality amplification. The addition of extra inputs, or quality room correction is just a bonus. Use it, don't use it, whatever... it's a big freebie anyway.