First: The rubber compounds in a tire deteriorate with time, regardless of the condition of the tread. A tire that's inflated and mounted under a vehicle is considered "in use" and subject to heat/cold, dirt, etc., as well as the ordinary aging of the compounds. See this article for the rundown:
https://www.edmunds.com/car-maintenance/how-old-and-dangerous-are-your-tires.html. I would NEVER want to ride in a vehicle with even one 24 year old tire on it. Assuming it would hold air long enough to drive anywhere anyway.
Next: Even if you have roadside assistance, you WILL need to have a "functional spare" tire in order to drive away from the breakdown location instead of being towed or leaving your vehicle there for the time it takes for someone to take the wheel/tire into a tire shop and return with a usable tire mounted on that wheel. I don't know what you think a "roadside assistance" person can do for you if you don't have a functional spare tire/wheel on the vehicle. I suppose they could sell you a spare tire on the spot but that sounds costly, assuming they were carrying something that would work.
Just a few months ago on a road trip, my minivan had a tire blowout. I pulled onto the shoulder of the interstate, not a fun place to hang out, BTW, and called AAA. I assumed I'd need a tow, but when the driver arrived he was able to inflate the "doughnut" spare tire in my 2008 minivan which allowed me to drive slowly to the nearest tire store. (The doughnut spare lives in an enclosed space inside the back of the vehicle but it's getting a little long in the tooth for reliability, sigh.) Oh, as to the tow. It happened that due to a boom in COVID cases, the tow company was NOT allowing passengers in their tow vehicles so if the van had to be towed I'd have been SOL on the side of the road. If you're happy to have a tow, that's your choice. It wouldn't be mine.