There are so many ways to teach the present form. You can talk about something that happens on a regular basis or refer to something that happens repetitively. You can also refer to something as a rule. So if a person plays in an orchestra that is what he does on a regular basis every day. It is not something that he is doing while the person is talking necessarily but there has to be a distinction between what we see done during the moment you are making an observation and when something happens on a day to day basis. This is a major hurdle for the beginner but it is still an excellent means of understanding the progressive voice in contrast to the simple present. The present is something related to a fact or a rule and so can be associated to things that happen around you like the fact that governments have elections every few years. That employed the use of the present tense.
A rule, or something which people do regularly because they have taught to do so, in order to get a certain response would be something like, "People hang out their clothes in order to dry them". The first part of the sentence uses the simple present and the second part uses a noun phrase that begins with the preposition in.
A law of nature also uses the present tense and would be something that affects our environment and us directly or indirectly, like every animal on the face of the planet is subject to gravity: "Gravity is a force that pulls you down". In this sentence, the present simple is then used again to describe what we are always subject to.
