It's not exactly an apples to apples comparison but my neighbor has a 2005 Grady White 270 Island with twin Yamaha F150's on it and we were in about 3' of water at the boat ramp on a very low tide and didn't have any issues. I noticed the boat we were following in behind didn't seem to be moving forward anymore, so I looked down at the Garmin and it said we were in 3' of water and told my neighbor to quickly stop the boat and go in reverse. Luckily we were in a no wake zone and we weren't going very fast and that I was at least slightly paying some attention to what was going on or else we would've likely gotten stuck there for a few hours, like the boat in front of us did. Again, it's a bit of an apples to oranges comparison and is definitely a ballpark figure as they are two vastly different size/models of boats but if you have a place that's really sandy and you don't mind checking it out yourself... I don't see the harm in that. I wouldn't want to be going very fast, or try it out on an area that's rocky or anything but yeah. I also "beached" my boat twice when picking people up from a low tide to go fishing with me. Our beach cabin is on Whidbey Island here in the Puget Sound/PNW and when it's a low tide, the sand between the beach and the waterline can get very soupy.
Of which we have a 12' Lund aluminum dinghy that has the wheels on the back of it to help you roll a bit more easily but over the last couple of years it's gotten pretty bad to where the wheels just sink. I instead bought a kayak to drag out as I don't want to twist an ankle or do damage to a knee or whatnot, just to get out to my boat/buoy at low tide. That, and the Lund is definitely one of the heavier 12' aluminum boats out there, and I'm a pretty strong guy. If you're pulling it out there on your own, you are pretty winded afterward as it's quite exhausting pulling something of that weight on flat, solid ground, not to mention trying to pull it a hundred yard or more knee deep in sand, water, seaweed and so forth. Long story short, I've picked up a few people and "beached" the boat on the low tides to go fishing with me and have done so in about 3' without any issue, though I typically have them "spot" me. As I'm driving in very, very slowly, I'll have them stand about knee deep in the bow area and then help them in over the side of the boat. Both times I've tried doing this in about 3' or so of water at the stern of the boat, they've been quite successful and without any issues. Not sure I'd want to go any less than a couple feet of water as I have a transom mounted transducer and don't want to have any issues with that.