What a bunch of geniuses. We'd have better luck arguing with rocks.
Sure, plants in coco can't be overwatered even when they're 2 inches tall. Go ahead, transplant your seedling in a 5 gallon pot and give it 5 gallons of water a day no matter what. If you've got problems, blame the pros who told you a bunch of non sense, wouldn't be the first time.
I believe the concrete floor underneath my fabric pots has been beneficial in the summer but is a deterent in the winter months. Other than that. Shiiiitttt. My "moms moldy basement" has been working pretty well for me.
Check out my Rio Coco round in there open top bags, totally saved my day. No more heavy soil, and pots are biodegradable. I plugged in irrigation it expanded and I transplanted 10 times faster. I got at weed farm supply, only place I could find only!