Do power meter is worth it? Even we can pace with speed

[MI-XC]

Do I need a Power meter for outdoor riding?

Only started using a PM recently which is on my smart trainer. Wouldn’t mind one on my outdoor bike but are they worth it. I’ve always used a monitor to guide me. The PM’s are a little costly as well??

Is it necessary for me to buy a power meter

I train using an indoor cycling table, low volume base, three times a week, Monday Wednesday Friday morning indoor ride, noon strength training, Tuesday Thursday rest day, Saturday and Sunday with my family. Monday to Thursday evening may be twice, accompanied by friends outdoor cycling, once about 30km, not exactly flat, but the average heart rate of about 145, the highest will not exceed 175, friends recommended that I buy a set of power meter for training, indoor and outdoor based on the sam…