I used to think it was just a social in-group/out-group thing, so English speakers could more easily spot foreigners for not knowing the odd pronunciations. But the more I learn about language the more I think of the adage "don't ascribe malice to what could be adequately explained by incompetence".
With how many speakers use English, I now think it just gets jumbled and mangled over time and there's no real central authority to correct for that. Ultimately that makes our words sound weirder and more colorful so it's not the worst thing, especially once you understand that even native speakers don't know how to pronounce most large words until heard.
No. Testicles, though lacking the raw strength of Muscles or the courage of elder Uncles, would not be separated from steadfast Principles. Though many tried to insult him with nicknames like "Tubercles" or "Microparticles", those could never stick like they did to poor Treacles or restrain his vigor like heavy Manacles.
Tired of senseless Debacles, he studied scholarly Articles and read ancient Chronicles and prayed nightly for the most magnificent Miracles. Finally one day while meditating, a vision of complex Epicycles formed in the most profound Tabernacles of his mind. He awoke to realize it mattered not what hateful words prodded him like chilly Icicles; he was already atop the Pinnacles of manliness, and he wasn't alone. From that day forth he hung proudly with his wiry protector, the hideous and patchy Follicles no one dared approach.