It’s not inconsistent. People do not have to use Apple products at all. The only way to avoid government taxes is to move somewhere with lower taxes, which can cost a lot of money. This makes Apple’s “tax” avoidable but other taxes not.
Also, all are welcome to invest in AAPL if they’d like to do so. You can buy partial shares through many brokerages so it doesn’t take much money to start. Some brokerages have essentially no minimum, which means even $1 will start.
A lot of the difference comes down to choice. With government taxes, individuals have very little say in paying money and how it is spent. Governments do a lot for the public good, but there is also a lot of waste. There is waste in private companies, but with a need to remain profitable and provide returns on people's investments, public companies have direct accountability to others that governments do not. In theory governments do, but in practice, it can be difficult to make sweeping changes in a government.
One last comment. If taxes are lowered, people have more money to keep. Whether that results in loss of "public good" is a different matter. If Apple "taxes" on apps are lowered, will people have more money to keep? Will the savings for company X, for example, mean that they will reduces prices by the amount they save on reduced commissions?