I think so yes if there is no hard fork I believe the value of bitcoin will be higher just as the same if there is no any other cryptocurrencies and bitcoin only exist the price could have skyrocketed more then what we have now. The hard forks affect the price of bitcoin slightly before it can recover.

This is just an assumption that the market cap of all the Bitcoin Fork be put to the current market of Bitcoin, it will simply mean at the Value of Bitcoin would increase. Imagine these list of forks's market cap added to Bitcoin, it is undeniable that Bitcoin could be way higher than what it is now.

This is completely dependent on the capacity of the coin that makes fork. Big forks like Bitcoin Cash unfortunately hurt. But there is a lot of unnecessary fork coin. I don't think they have an impact on BTC.

That greedy attitude created a big impact to bitcoin value, they bought btc to receive free bch and after receiving the rewards they completely dumped both coins and enjoy the profits, if that fork never happened the value of bitcoin should not be suffer to this fall, it should be at the half or more from the last high that it reached, so I'm also in the position that the fork really bring impact to the current value of bitcoin.

Well, it all comes down to what those people expect from their forks. If the forks didn't exist then the investors who had moved into those respective chains likely would have just pulled their money out of crypto completely and identified some other alternative investment. I don't think it would dramatically change the price of Bitcoin, even 5% seems like too much considering the value of the other forks like Cash, Gold, there was some other fork I can't remember the name of now. Regardless, their existence probably doesn't significantly impact the value of Bitcoin. I'd assume the price of Bitcoin would remain around the same unless there is some major whale I'm missing who would completely shake up the market.

I think, hard fork doesn't affect the volatility of BTC. there are no BTC cores that can beat the price of BTC. if there is a hardfork, a new bitcoin network split will be formed. So, each Bitcoin will eventually run on two different networks. but, the most decisive thing is if the hardfork coin can attract investors and public enthusiasm.

Many people consider that if there were no altcoins and forks, all the dollars that went into the market would be invested in bitcoin. But if only Bitcoins existed, a lot of people would never get involved with the market.

Forks should serve to test theories, test different ways of solving a problem. Bitcoin Cash has been testing the theory of larger blocks, for example. If the forks did not exist, the conflict between different groups could annihilate the bitcoin.

So I believe that forks increase the price of bitcoin. Allowing stupid people to simply make a fork and test their ideas instead of complaining about bitcoin forever.

The price will be higher, if there's no fork the investors won't diversify their investment and they will more focus on bitcoin, the splitting transaction volume will create a weaker coin and lower price, from a lot of forking that I witnessed it create a chaotic situation to the market and make the price falling down quite hard

it is impossible to say because although all these shitcoin forks were insignificant and 90% of them are already dead, they still had their own effects on bitcoin market that changed the price. so without them we might have seen a slightly different trend in 2017 and then 2018.
but you seem to be asking about the current price and if that is the question then i believe there wouldn't have been any difference and the current price would have been the same.