Wrong.
You only slightly slow the spread with masks and social distancing.
The longer you stretch it out, the number of dead is greatly increased because it is essentially only the vulnerable that die, and the longer you allow the epidemic to exist, the more it will get though the quarantine of the elderly.
Your asymptomatic statement proves you're wrong.
If the number of infected is small, the odds of the elderly contacting them is equal to their numbers, ex 10%.
If 90% of cases are asymptomatic, that means those asymptomatic people will push contact with the elderly to 90%, and not 10%.
You need to take a science lesson.