Grass isn't a fungus. However, most grasses require a lot more maintenance then some of the easier to care for aquatic plants. Most grasses require a rich substrate, not just gravel, but something mineral rich. Also most grasses flourish in high lighting and CO2 rich water. I'm no expert of plants, but from learning about aquascaping, that is what I've gathered about grasses, I dream of having grasses in my tanks... I just need the money and the right set up to do so. However, I do think dwarf hairgrass is one of the easier grasses to care for. Lucky Bamboo isn't an aquatic plant, it's not even a true bamboo, from what I've read. Also, some of the low maintenance plants do just fine being left in the baskets. I know some members put plants in shot glasses in the tanks so that they can move them around for water changes. There's also things like this
used to protect roots and allow for mobility, but it's a more expensive option.