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Exactly I agree main reasons are that governments would never accept currency they can not control and Bitcoin network is too slow to handle massive number of transactions needed for everyday use. Because of these issues many people agree with you that Bitcoin is better suited as store of value much like digital gold other than regular currency. It is considered long term asset for savings and protecting wealth not for daily purchases.
The government could make regulatory laws that can give them have a slight control over Bitcoin transactions. Some wallet addresses can be directed by the government to be censored and decentralized exchanges can be banned. This will force people to use only centralized platforms where KYC is compulsory. Although the government can not totally control the Bitcoin ecosystem but they can make it difficult for people to enjoy the freedom its offers. Bitcoin volatility and the use of Bitcoin mainly as an asset might some of the reasons why it is not yet popularly used as currency.