Golang为什么不能下载某些网页？

I want to download Fantasy Football Data to analyse in Go, but when I try to download from this api page then I get back an empty response, even though the code works for other websites, e.g. this api page

Minimal reproduction, outputs an empty array.

package main

import (
    "fmt"
    "io/ioutil"
    "net/http"
    "time"
)

const AllPlayerData = "https://fantasy.premierleague.com/drf/bootstrap-static"

func main() {
    downloadAllData()
}

func downloadAllData() {
    client := &http.Client{
        Timeout: 20 * time.Second,
    }

    response, err := client.Get(AllPlayerData)
    if err != nil {
        fmt.Println("Unable to download player data.")
        return
    }

    body, err := ioutil.ReadAll(response.Body)
    if err != nil {
        fmt.Println("Failed to read response")
        return
    }

    defer response.Body.Close()

    fmt.Println(body)
}

The same webpage downloads fine in Python:

import requests
url = "https://fantasy.premierleague.com/drf/bootstrap-static"
r = requests.get(url)
print(r.content)

I don't think it's related to e.g. Ajax calls as viewing the network requests in Chrome doesn't show up any beyond the page load itself

They are doing some sort of validation on the user agent, the following code works:

package main

import (
    "fmt"
    "io/ioutil"
    "net/http"
    "time"
)

const AllPlayerData = "https://fantasy.premierleague.com/drf/bootstrap-static"

func main() {
    downloadAllData()
}

func downloadAllData() {
    client := &http.Client{
        Timeout: 20 * time.Second,
    }

    request, err := http.NewRequest(http.MethodGet, AllPlayerData, nil)
    if err != nil {
        fmt.Println("Unable to create request.")
        return
    }
    request.Header.Add("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36")
    response, err := client.Do(request)
    if err != nil {
        fmt.Println("Unable to download player data.")
        return
    }

    body, err := ioutil.ReadAll(response.Body)
    if err != nil {
        fmt.Println("Failed to read response")
        return
    }

    defer response.Body.Close()

    fmt.Println(string(body))
}