So many people think anything called a "timeshare" is a worthless scam. And many people DO get taken advantage of. But I don't think of timeshares as a scam, I think of them as a math problem, with the knowledge that most people are incompetent at basic math.
It doesn't matter if you travel 10 weeks a year or 3 days a year, or if you travel to a different place every year or the same location... If it saves you money and/or aggravation compared to what you were doing before, it's a win. That's where timeshares make sense.
In my case, my family likes to ski & snowboard in the winter & spring. Over the last 20 years we've watched as we've been completely priced out of rentals in resort areas. It isn't that we can't afford it, it's that rentals have become completely absurd. I can't enjoy a trip if my family is crammed into a tiny hotel room for $700 per day! So, we looked at the value proposition of ownership (remember, it's all just a math problem, and I like working the math from all angles). After running all the expenses a resort condo owner has to pay, I came to the conclusion that the only people in resort areas who get ripped off more than renters are the owners. It's their fault though, they're the ones choosing to pay $2000 per square foot for their own personal "albatross".
Aside from the skyrocketing cost of renting, the reality is that so many people don't care about the cost, and gobble up reservations a year in advance. My family can't plan that far ahead, we barely know what our schedule will look like one month ahead of time. Which means by the time we can search for a place to stay, everything is sold out and I end up searching 2x per day on multiple sites for last-minute cancellations. Frustrating.
Deeded fixed-week ownership at a locally owned and managed resort changed all of that for us. We own every week we could realistically ever use for travel, and when we can't use any of our time (either a full week or a few days of our week), we just have the resort rent the unused days for us. With the 65% of the rental income we get from this arrangement, we're able to stay in one of the most expensive resort areas in the world for almost nothing, and we never have to struggle to find last-minute reservations again. I believe timeshares are the hidden secret of vacation bliss for those who are capable of understanding what they're getting into.