Going to the store - I'd prefer to drive in LA on an average day of the year.
For the mid-range activities we have to compare like with like. For some low-mid range activity (like a local park) indeed, walking in Amsterdam would be more convenient. Something more remote/infrequent (e.g. a specialized gym like a climbing gym or a large pool), I'd prefer to drive rather than take transit.
As for the surrounding area it doesn't really depend on the city itself, LA is surrounded by desert and mountains, Amsterdam is in one of the most historically agriculturally productive (and so, densely populated for centuries) and flat areas in Europe. If LA was built like Amsterdam, it'd still take forever to get anywhere interesting outside of the city.
For the mid-range activities we have to compare like with like. For some low-mid range activity (like a local park) indeed, walking in Amsterdam would be more convenient. Something more remote/infrequent (e.g. a specialized gym like a climbing gym or a large pool), I'd prefer to drive rather than take transit.
As for the surrounding area it doesn't really depend on the city itself, LA is surrounded by desert and mountains, Amsterdam is in one of the most historically agriculturally productive (and so, densely populated for centuries) and flat areas in Europe. If LA was built like Amsterdam, it'd still take forever to get anywhere interesting outside of the city.