Sure, but that begs the question of "why a mechanical watch"? A simple quartz watch doesn't need to replace batteries for years, is very accurate and much cheaper still. For many people it boils down to "I like the mechanical engineering aspect and want to show that" (status and signalling) or as a fashion item. Of course, that is a different signal than the rolex "I am rich", but it is a signal. Which is perfectly fine; most clothing and accessories are like that. The point is "because it tells time" is nowadays more of a secondary function after that.
Just as an anecdote: A friend would often wear a very fashionable, old, mechanical watch. That watch would sometimes just stop, but that did not matter because the primary function was being jewellery on the wrist.
A mechanical watch doesn't need any intrusion and can work for years if not decades, and if it needs a service there are a lot of qualified people who can do it, including full disassembly and assembly. From that point of view, it can be a "lifetime" device.
Any smartwatch, no matter how expensive, will reliably and predictably turn into a paperweight when it stops being supported by the manufacturer. Many smartwatches will do it sooner — when their non-replaceable battery is out of juice.
Just as an anecdote: A friend would often wear a very fashionable, old, mechanical watch. That watch would sometimes just stop, but that did not matter because the primary function was being jewellery on the wrist.