It's all about the type of sailing you do.
We sold our dinghy last year. It was an inflatable Zodiac
with a small outboard
and served well for our purposes. For many years we used it often but slowly stopped doing so as the captain's knee got increasingly worse. I might add that boat had a difficult stern ladder to climb. As our habit had us anchoring
off for a few nights, then taking a mooring
for a night, the system worked for us. The dinghy allowed us to stay out longer.
We carried that dinghy around for three years and didn't use it. Then we got a new boat with a scoop stern & good ladder. With guests aboard, we launched the dinghy for the first time in years--and learned two things. First, after that long without use, the glue was failing & we had a leak. Second, while the new boat made it easier to get on & off the boat, it didn't help with landing on shore with a bad knee. So, while we still anchor
out as much as possible, we stay aboard when we do. We take a mooring
when we need to provision, eat out, or whatever other land activities we need. Health
has thus decreed. Not optimal, but certainly you can sail in the Med without a dinghy. We do.