Well this is patently false.
The 4e bard could be built to be a primary healer, controller, or striker, had Jack of all trades and a feat that boosted it, and had no limit on how many classes it could MC. With MC and at least one or two paragon paths, Bards could even grab some Defender, though it was their weakest secondary role*.
*kinda. They could be built for a very swordmage style tricky kiter defender with decent control style, but making them to traditional tanking was hard.
5e gives them skills all over the place, a very wide spell list, ability to Jack other classes spells, and subclasses that cover roles the base class isn’t good at.