Why English Pronunciation is Difficult?

In this video, Alisha answers 6 questions. - How do you pronounce the word “comfortable” in AmE? Is there a right and a wrong way, or is it just a matter of personal preference? - I want to know the difference between "commendable" and "admirable" please! - What's the difference between "Blog" and "Vlog"? - Why does english have strange pronunciation rules? For instance, pizza is pronounced as peetza, in comb, the b remains silent, but in tomb and womb it's pronounced differently. - When can I use "As well" at the end of phrases? - What is the meaning of "Be there/Be square"?