It is clear that after making a long-term investment, if an investor monitors the market regularly and due to small changes in the market, that investor himself is affected and sells his investment, then this investment strategy is not called a long-term investment. If an investor sells his investment at some profit after purchase then we will consider it as early trading. Investing is not as easy as it sounds. In long term investment planning an investor needs to be patient enough and have the mindset to sacrifice a lot. After investing it is normal to make profit or loss due to market volatility, if you cannot hold enough capital during this temporary profit or loss then the investment is worthless.
I am wondering in terms of your point how an investor would be harmed by observing the market itself. See, those who sell their investments because of the slightest change in the market were never investors. Because a successful and experienced investor will never sell his investment because of a slight change in the market. Investors and long-term investors may be aware of market volatility.
Investing is not as difficult as you think. Greed and emotions should be controlled before investing. If the investors can control the emotions in his investments, he may be able to be patient during the slight dumping of the market. Also, investing is not a get-rich-quick investment. Invest only as much as you can afford to lose.
Regardless of the investment method you adopt, it is very important to have a fixed source of income before investing. Because through this source of income you will be able to continue your investment smoothly with the remaining money regardless of income expenditure and family expenses.