Sharpies are very beach-able and as David M in post #10 above, slyly suggests the issue may be :how unbeach-able are they? OP. did qualify that in beaching craft should remain upright (more or less?) and most sharpies will do this nicely.
In protected waters esp. with little tidal range, a small beach able craft opens up many opportunities like camping or exploring ashore ,getting supplies,a chance for some lower body exercise etc. without the need for a separate tender
with all its attendant gear
and risk of theft. Of course for the most part we are discussing smaller craft but much of the limitations are ameliorated but the easy access to shore and the lack of a cumbersome dingy (head?) taking up so much space on your smaller craft.
Sharpies and other camp cruisers answer nicely the newbie question as to where to start on a limited budget
;and with a simple trailer can easily get to distant cruising grounds by highway while avoiding marina and storage
IMHO a higher level of seamanship will be attained ( and ultimately required )by the small craft adventurer than many well heeled owners ever attain in their titiainium Crab Crusher outfitted to go to the moon.