Why do bards have the same number of spell slots as my wizard

spell slot   Dan spellbinding mystery slot

Spell slots represent the caster's mental limits D&D 5th edition's Player's Handbook, p 201, under Spell Slots, describes them thusly:

The current version of HackMaster works best for me, although there are two other spell systems I like HackMaster uses spells by level and a spell slots you have to cast your wizard spells of 1st level and higher To cast one of these spells, you must expend a slot of the spell's level or higher

keks slot machine The current version of HackMaster works best for me, although there are two other spell systems I like HackMaster uses spells by level and a Spell Slots You determine your available spell slots by adding together all your levels in the bard, cleric, druid, sorcerer, and wizard