In my opinion, what gives BTC it's value and utility within this context isn't necessarily the level of decentralization itself but rather the features that it's decentralization brings about. I find centralization and decentralization to be a on a spectrum, with each end providing its own set of values and utility. On one hand the BTC token distribution among users is verifiably the most widespread & decentralized among all cryptos with no small group of users holding the majority of tokens like other chains, while on the other hand some might consider the concentration of mining pools to be centralized (i don't believe so). Either way, what really matters is the features brought upon by its level of decentralization-BTC's being the most immutable and most liquid but on the other hand not necessarily the fastest. Even as you slide down the spectrum towards greater centralization with other networks like ETH, Cosmos or even others like ICP with less than 150 actual physical nodes, people are still able to find value and different utilities in it through features like speed and usability (low fees) even with it being more centralized. This even goes for services and dapps where DEXs and such might offer great customizability and freedom for power users but on the other hand centralized incumbents have the edge when it comes to usability, variety, UI and stuff like that. So overall I wouldn't judge BTC based on how decentralized it is, I think it's essential to focus on why people buy their bitcoin and what utility/value it provides for them, not if its decentralized or not, the utility and value differs for everyone. Like I said some people might call the token distribution decentralized while at the same time calling the mining pool concentration centralized, though at the end of the day it is the most immutable/secure/hardest to attack and that's what gives value to it for me.
A very good point you’ve made here, It isnt really the decentralization itself that makes it useful but really what utilities it can provide, with services. The decentralization itself has either made its operation easily accessible and more expensive to acquire.
Though different actions for different context, i personally feel the decentralization of BTC is one of the major reason why it is advisable to buy it more on centralized exchanges in order to have a reasonable amount of asset guarantee, tokens of such can be manipulated and sold as fake on DEXs.
At the same time CEX will offer a considerable amount of fee when carrying out transactions on such token in compare to when carrying out transactions on DEX.
Since Bitcoin is decentralized it’s beneficial to lower barriers to its entry through CEX as it will even improve ones understanding of the use of such tokens, it’s wide range importance, it can equally be trade on features even without having much understanding of trading just as Bitget introduced into crypto their copy trading feature.