FrogReaver
The most respectful and polite poster ever
Wizards not gonna know that many rituals at low levels.
I regard bard dice roughly on par with 1st level spells. As in a single bard dice. For example using bard dice to buff AC or impose a penalty its similar to shield but you can do other stuff with them.
You're also assuming a wizard has 10 minutes to cast a ritual. The low level rituals while useful are that great in the grand scheme of things.
1. If you regard the bard inspiration dice as equal to a spell then what do you regard the divination dice as equal to? a higher level spell?
2. Bard dice to buff ac is much worse than shield. There's still a huge chance you are going to be hit whereas shield virtually guarantess you won't be.
3. A third level wizard can only prepare 6 spells. He can take 4 rituals with limited downside.
4. Rituals take a bit to cast. They clearly aren't useful in time important situations but many exploration based challenges aren't necessarily time sensitive. Detect magic is great to cast periodically. comprehend languages is always good. Of course find familiar is a great scout. Then you can take alarm to help with rests or unseen servant to help with traps.
The bard is the caster that struggles to find known spells to take rituals.