There's no yes or no answer. Personally, I still miss my flasher (a very old style of depth sounder) because it gave a sense of the how 'hard' the bottom is
as well as how far down it is.
Some of the fish
finders also give some idea of the penetration of the bottom. That can help you figure out if you're over weeds, soft mud, hard mud or softish sand, hard sand or rock... and so give you one more tool in figuring out whether to try to anchor
and which anchor
to try first. Many of them give you a track, so you can see very visibly the bottom trend.
Most of the 'sailboat' instruments
just give you a digital number.
As to whether it's worth it for you, you're going to have to do your homework. Find out what kind of thru-hull or in-hull transducer
you can use and how much it costs. Figure out if this is an installation
you can do or if it needs to be done at a yard. (You might want to use the yard quote anyway, because your time isn't free and you may need additional tools, materials, etc.) If your boat
is in the water
and you're installing a thru-hull, you're going to need to haul out