Exactly. Most people are proficient in 1/2 languages maybe, but in many cases, it is pretty common to be in a situation where you need ramp quickly to just understand stuff and make modest changes to the code when necessary. Don't really understand why people seem to make a big fuzz about it like it is a huge commitment.

Unpopular opinion stated, programming language as a skill by itself will gradually lose its importance in job market. Companies, specially big ones, will hire for domain experts, rather than language specialists.