As I used to tell my students,
Verbs have more fun
Every clause has a verb form in it, and there are always more things you can do to a verb than to a noun. In Latin, for instance, nouns are marked (or "declined", into declensions) for person, number, gender, and case. Verbs, however, are marked (or "conjugated" into conjugations) for tense, voice, mood, aspect, person, and number. The person and number usually get copied from the subject, but marked on the verb.
And this is not the end. The Roman grammarians that distinguished between noun and verb (but not between noun and adjective -- that's another story), also distinguished between verbs and participles. A participle -- like broken or breaking in English, which we consider forms of the verb root break -- was not considered a verb in Latin grammar, but rather its own part of speech.
This was not surprising, since Latin had a LOT of participles, distinguished by voice, mood, aspect, number, and gender (the latter two often copied from a modified noun). So participles formed paradigms and needed to be conjugated, too, though they didn't have tenses and they didn't necessarily agree with their subjects.
And this was just Latin, a close relative of English. Though Modern English is quite different.
Take a language like Turkish for comparison; like Latin, it has a lot of suffixes. Turkish nouns can take a lot but Turkish verbs can take many more. Note that Turkish paradigms are different -- most of them are simple and one-dimensional, with one or a few choices, or zero, followed by another one-dimensional paradigm, [almost ad infinitum]. Turkish grammar is very regular, but that regularity is governed by verb roots, which must be learned (and are learned, by children, without difficulty).
There are languages without much in the way of inflection, which is what is going on in Latin and Turkish conjugations. Mandarin Chinese, Vietnamese, and English all have little or no conjugation. Every verb in Turkish has several hundred forms; but the only verb in English with more than 4 forms is "be": be, am, is, are, was, were, being, been. That's 8 forms. Most English verbs have 3: type, typed, typing; they might as well only have one. And many do: set, set, set; cut, cut, cut; quit, quit, quit.
Verb forms are on the way out in English.
But these languages are just as hard as the ones with a lot of inflection.
They have syntax, instead, and it's complicated.